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Fencer Vulns
medium 6.5

CVE-2025-64433 json

KubeVirt Arbitrary Container File Read

published 2025-11-06 12 mo ago modified 2026-09-10 1 mo ago also EUVD-2025-38217 , GHSA-qw6q-3pgr-5cwq , GO-2025-4109

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

KubeVirt is a virtual machine management add-on for Kubernetes. Prior to 1.5.3 and 1.6.1, a vulnerability was discovered that allows a VM to read arbitrary files from the virt-launcher pod's file system. This issue stems from improper symlink handling when mounting PVC disks into a VM. Specifically, if a malicious user has full or partial control over the contents of a PVC, they can create a symbolic link that points to a file within the virt-launcher pod's file system. Since libvirt can treat regular files as block devices, any file on the pod's file system that is symlinked in this way can be mounted into the VM and subsequently read. Although a security mechanism exists where VMs are executed as an unprivileged user with UID 107 inside the virt-launcher container, limiting the scope of accessible resources, this restriction is bypassed due to a second vulnerability. The latter causes the ownership of any file intended for mounting to be changed to the unprivileged user with UID 107 prior to mounting. As a result, an attacker can gain access to and read arbitrary files located within the virt-launcher pod's file system or on a mounted PVC from within the guest VM. This vulnerability is fixed in 1.5.3 and 1.6.1.

Patch / fix

  • go kubevirt.io/kubevirt 1.5.3, 1.6.0-beta.0.0.20250801195231-a81b27d4600c, 1.6.1
  • kubevirt kubevirt 1.5.3, 1.6.1
  • kubevirt SLE Module for Containers 15 SP7 1.6.3-150700.3.13.1

suse advisories SUSE-SU-2025:4330-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • kubevirt1.8 openSUSE Tumbleweed 1.8.3-1.1
  • kubevirt-1.8 openSUSE Tumbleweed 1.8.3-1.1
  • kubevirt openSUSE Tumbleweed 1.6.3-1.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2026:11091-1openSUSE-SU-2026:11057-1openSUSE-SU-2025:15772-1

  • kubevirt Azure Linux 3.0 1.5.3-2
  • kubevirt CBL-Mariner 2.0 0.59.0-33

azure linux advisories AZL-69799AZL-69958

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-64433 updated cvss 6.5

kubevirt.io/kubevirt: KubeVirt Arbitrary Container File Read

  • Red Hat OpenShift Virtualization 4 kubevirt, container-native-virtualization/virt-api, container-native-virtualization/virt-handler, container-native-virtualization/virt-launcher, container-native-virtualization/virt-operator, container-native-virtualization/virt-api-rhel9, +22 more Red Hat Web Terminal web-terminal/web-terminal-tooling-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
11 mo ago

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/kubevirt/kubevirt/security/advisories/GHSA-qw6q-3pgr-5cwq referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
go kubevirt.io/kubevirt
<1.5.3
>=1.6.0-alpha.0, <1.6.1
>=1.6.0-alpha.0, <1.6.0-beta.0.0.20250801195231-a81b27d4600c
>=1.6.0-rc.0, <1.6.1
1.5.3
1.6.1
1.6.0-beta.0.0.20250801195231-a81b27d4600c

Affected products

  • kubevirt kubevirt

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.